Light-emitting device, optical device, and information processing device

Abstract

A light-emitting device includes: a light source including light-emitting elements configured to oscillate in a single transverse mode; and an optical member that is provided on a light-emitting path of the light source and configured to diffuse and emit light emitted by the light source.

What is claimed is: 
     
         1 . A light-emitting device comprising:
 a light source comprising a plurality of light-emitting elements configured to oscillate in a single transverse mode; and   an optical member that is provided on a light-emitting path of the light source and is configured to diffuse and emit light emitted by the light source.   
     
     
         2 . The light-emitting device according to  claim 1 , wherein the light-emitting element is a vertical-cavity surface-emitting laser element. 
     
     
         3 . The light-emitting device according to  claim 2 , wherein the vertical-cavity surface-emitting laser element has a long resonator structure. 
     
     
         4 . The light-emitting device according to  claim 1 , further comprising an electrode pattern that connects the plurality of light-emitting elements in parallel to each other, the electrode pattern covering a region excluding emission ports of the light-emitting elements in a continuous pattern. 
     
     
         5 . The light-emitting device according to  claim 2 , further comprising an electrode pattern that connects the plurality of light-emitting elements in parallel to each other, the electrode pattern covering a region excluding emission ports of the light-emitting elements in a continuous pattern. 
     
     
         6 . The light-emitting device according to  claim 3 , further comprising an electrode pattern that connects the plurality of light-emitting elements in parallel to each other, the electrode pattern covering a region excluding emission ports of the light-emitting elements in a continuous pattern. 
     
     
         7 . The light-emitting device according to  claim 1 , wherein the optical member is configured to emit the light emitted from the light source while changing directivity of the light. 
     
     
         8 . The light-emitting device according to  claim 2 , wherein the optical member is configured to emit the light emitted from the light source while changing directivity of the light. 
     
     
         9 . The light-emitting device according to  claim 3 , wherein the optical member is configured to emit the light emitted from the light source while changing directivity of the light. 
     
     
         10 . The light-emitting device according to  claim 4 , wherein the optical member is configured to emit the light emitted from the light source while changing directivity of the light. 
     
     
         11 . The light-emitting device according to  claim 5 , wherein the optical member is configured to emit the light emitted from the light source while changing directivity of the light. 
     
     
         12 . The light-emitting device according to  claim 6 , wherein the optical member is configured to emit the light emitted from the light source while changing directivity of the light. 
     
     
         13 . The light-emitting device according to  claim 7 , wherein the optical member is a plate-like member having a structure configured to change a directivity of light on at least one surface of the plate-like member. 
     
     
         14 . The light-emitting device according to  claim 8 , wherein the optical member is a plate-like member having a structure configured to change a directivity of light on at least one surface of the plate-like member. 
     
     
         15 . The light-emitting device according to  claim 1 , wherein the optical member is configured to emit light used for measuring a three-dimensional shape by a time-of-flight method. 
     
     
         16 . The light-emitting device according to  claim 1 , wherein the light source and the optical member are mounted on a portable information processing terminal, and the light source is driven by a battery. 
     
     
         17 . A light-emitting device comprising:
 a light source comprising a plurality of vertical-cavity surface-emitting laser elements each having a long resonator structure; and   an optical member that is provided in a light-emitting path of the light source and configured to diffuse and emit light emitted by the light source.   
     
     
         18 . An optical device comprising:
 the light-emitting device according to  claim 1 ; and   a light-receiving unit configured to receive light that is emitted from a light source of the light-emitting device and reflected by a measurement target,   wherein the light-receiving unit is configured to output a signal corresponding to a time from when the light is emitted from the light source to when the light is received by the light-receiving unit.   
     
     
         19 . An information processing device comprising:
 the optical device according to  claim 18 ; and   a shape identifying unit configured to identify a three-dimensional shape of the measurement target based on the light that is emitted from the light source of the light-emitting device of the optical device, reflected by the measurement target, and received by the Light-receiving unit of the optical device.   
     
     
         20 . An information processing device according to  claim 19 , further comprising
 an authentication processing unit configured to perform an authentication process related to use of the information processing device based on a result of identification performed by the shape identifying unit.